/*
 * Niiuzu
 * Copyright (C) 2011  Thierry Nowak
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.niiuzu.client.util.callback;

import com.google.gwt.user.client.rpc.AsyncCallback;
import com.niiuzu.client.eventbus.CommonEventBus;
import com.niiuzu.client.util.LoadingTicket;
import com.niiuzu.shared.exception.BusinessException;

/**
 * Tronc commun de tous les {@link AsyncCallback} utilisés dans l'application.
 */
public abstract class AbstractCallback<T> implements AsyncCallback<T> {

	private CommonEventBus eventBus;
	private LoadingTicket ticket;

	/**
	 * Construit une nouvelle instance de {@link AbstractCallback}.
	 */
	public AbstractCallback(CommonEventBus eventBus) {
		this(eventBus, null);
	}

	/**
	 * Construit une nouvelle instance de {@link AbstractCallback}.
	 */
	public AbstractCallback(CommonEventBus eventBus, LoadingTicket ticket) {
		this.eventBus = eventBus;
		this.ticket = ticket;
	}

	@Override
	public void onFailure(Throwable caught) {
		if (ticket != null) {
			eventBus.loadingFinished(ticket);
		}

		if (caught instanceof BusinessException) {
			eventBus.businessErrorOccurred(caught.getMessage());
		} else {
			eventBus.technicalErrorOccurred(caught);
		}
	}

}
